Contact washer

Abstract

A novel type of washer for installation at a terminal of a storage battery so to make an improved electrical contact between the terminal; the washer consisting of a circular ring made of a tin and lead alloy which when squeezed between the face of the terminal and the face of a lug mounted on the end of the cable deforms the washer surface to fit precisely to the mating faces and forms a broad surface contact.

I claim: 
     
       1. In a battery system including an electric storage battery having at least one terminal electrode with a flat upper surface and an internally threaded hole, a battery cable for connection to said terminal electrode, a lug terminating said battery cable, a special washer connected to said lug and having a flat lower surface and a screw coupled to said lug and extending through said washer for engaging said threaded hole, the improvement comprising, a ring-shaped contact washer with a circular cross section for insertion between the upper surface of said terminal and the lower surface of said special washer said contact washer being made of a metal alloy comprised of tin and lead, and capable of being deformed when pressed between said two flat surfaces to change its contact to said surfaces from a line contact to a broad surface contact.